Right now, the only real sector moving toward requiring the vaccine is colleges, and even then it’s not really clear how this policy will be enforced. When the FDA authorization moves from emergency to “fully authorized,” I expect colleges, military, etc. will move on enforcement, but until then it’s going to function as more of a strong suggestion.
I don’t foresee BGW entering into this space: there just isn’t a justifiable reason, with a primarily outdoor park. The whole industry is going to have to figure out the timing of when to move from masks to masks indoors to distancing but no masks to “back to normal” over the next 6-8 months. And while encouraging vaccination is in their best interest to GET to that normal, requiring it feels outside of their public image to me.
“Buy one ticket, get one free if you’re vaccinated” might be the only thing I can think of that might work for the park to push vaccination without requiring it.